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我已經想通了綁定動態樹視圖與ReactiveUI內用戶控件方式分層數據源（樹視圖）。如何使用ReactiveUI與
但是... 頂層結合HierachicalDataSource在XAML沒有後面的代碼，我需要直接設置的ItemsSource，而不是使用this.OneWayBind％的一般模式爲ReactiveUI結合。
所以，我的問題是：我錯過了在ReactiveUI框架，讓我和this.OneWayBind結合並移動到HierachicalDataTemplete後面的代碼或定製用戶控制的東西嗎？
特別是 - OneWayBind是否支持Hierarchical Data Templates的另一種重載或在使用時抑制呼叫的數據模板生成？
更新 我添加選擇的項目，以及擴大和選擇，以我的測試項目程序上的支持，但我有一個樣式到XAML。我想，以取代用一個簡單的RxUI綁定爲好。更新的例子。
下面是關鍵細節：
樹控件在主視圖中
<TreeView Name="FamilyTree" >
<TreeView.Resources>
<Style TargetType="{x:Type TreeViewItem}">
<Setter Property="IsSelected" Value="{Binding IsSelected, Mode=TwoWay}"/>
<Setter Property="IsExpanded" Value="{Binding IsExpanded, Mode=TwoWay}"/>
</Style>
<HierarchicalDataTemplate DataType="{x:Type local:TreeItem}" ItemsSource="{Binding Children}">
<reactiveUi:ViewModelViewHost ViewModel="{Binding ViewModel}"/>
</HierarchicalDataTemplate>
</TreeView.Resources>
</TreeView>
主視圖代碼後面
public partial class MainWindow : Window, IViewFor<MainVM>
{
public MainWindow()
{
InitializeComponent();
//build viewmodel
ViewModel = new MainVM();
//Register views
Locator.CurrentMutable.Register(() => new PersonView(), typeof(IViewFor<Person>));
Locator.CurrentMutable.Register(() => new PetView(), typeof(IViewFor<Pet>));
//NB. ! Do not use 'this.OneWayBind ... ' for the top level binding to the tree view
//this.OneWayBind(ViewModel, vm => vm.Family, v => v.FamilyTree.ItemsSource);
FamilyTree.ItemsSource = ViewModel.Family;
}
...
}
MainViewModel
public class MainVM : ReactiveObject
{
public MainVM()
{
var bobbyJoe = new Person("Bobby Joe", new[] { new Pet("Fluffy") });
var bob = new Person("Bob", new[] { bobbyJoe });
var littleJoe = new Person("Little Joe");
var joe = new Person("Joe", new[] { littleJoe });
Family = new ReactiveList<TreeItem> { bob, joe };
_addPerson = ReactiveCommand.Create();
_addPerson.Subscribe(_ =>
{
if (SelectedItem == null) return;
var p = new Person(NewName);
SelectedItem.AddChild(p);
p.IsSelected = true;
p.ExpandPath();
});
}
public ReactiveList<TreeItem> Family { get; }
...
}
TreeItem基類
public abstract class TreeItem : ReactiveObject
{
private readonly Type _viewModelType;
bool _isExpanded;
public bool IsExpanded
{
get { return _isExpanded; }
set { this.RaiseAndSetIfChanged(ref _isExpanded, value); }
}
bool _isSelected;
public bool IsSelected
{
get { return _isSelected; }
set { this.RaiseAndSetIfChanged(ref _isSelected, value); }
}
private TreeItem _parent;
protected TreeItem(IEnumerable<TreeItem> children = null)
{
Children = new ReactiveList<TreeItem>();
if (children == null) return;
foreach (var child in children)
{
AddChild(child);
}
}
public abstract object ViewModel { get; }
public ReactiveList<TreeItem> Children { get; }
public void AddChild(TreeItem child)
{
child._parent = this;
Children.Add(child);
}
public void ExpandPath()
{
IsExpanded = true;
_parent?.ExpandPath();
}
public void CollapsePath()
{
IsExpanded = false;
_parent?.CollapsePath();
}
}
Person類
public class Person : TreeItem
{
public string Name { get; set; }
public Person(string name, IEnumerable<TreeItem> children = null)
: base(children)
{
Name = name;
}
public override object ViewModel => this;
}
人稱視角用戶控制
<UserControl x:Class="TreeViewInheritedItem.PersonView"... >
<StackPanel>
<TextBlock Name="PersonName"/>
</StackPanel>
</UserControl>
人視圖代碼後面
public partial class PersonView : UserControl, IViewFor<Person>
{
public PersonView()
{
InitializeComponent();
this.OneWayBind(ViewModel, vm => vm.Name, v => v.PersonName.Text);
}
...
}
寵物工作方式相同的人。
而整個項目是在這裏ReactiveUI Tree view Sample